PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 261-0320-005
261-0320-005 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

SEAL,CONICAL,FLARED TUBE FITTING. Key specifications include material: ALUMINUM ALLOY 1100, body_length: 0.090 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN, wall_thickness: 0.010 INCHES NOMINAL IN, outside_diameter: 0.958 INCHES MINIMUM AND 0.963 INCHES MAXIMUM IN, style_designator: SEAL, seat_angle_in_deg: 37.0. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-070-3507, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
261-0320-005
NSN: 4730-01-070-3507
FSC: 4730
CAGE: 94756 — THE BOEING COMPANY DIV LEGACY BOEING HB1 (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 1100
body_length0.090 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
wall_thickness0.010 INCHES NOMINAL IN
outside_diameter0.958 INCHES MINIMUM AND 0.963 INCHES MAXIMUM IN
style_designatorSEAL
seat_angle_in_deg37.0
casehardening_indicatorNOT CASEHARDENED
end_item_identificationAIRCRAFT, STRATOLIFTER C-135, MISSILE, MX PEACEKEEPER
material_document_and_classificationQQ-A-250/1,O FED SPEC 1ST MATERIAL RESPONSE OR AMS 4001 ASSN STD 2ND MATERIAL RESPONSE
hose/tube_outside_diameter_for_which_designed0.750 INCHES NOMINAL IN
NSN4730-01-070-3507
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 261-0320-005 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BODY LENGTH: 0.090 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
•
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.750 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 37.0
•
OUTSIDE DIAMETER: 0.958 INCHES MINIMUM AND 0.963 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY 1100
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/1,O FED SPEC 1ST MATERIAL RESPONSE OR AMS 4001 ASSN STD 2ND MATERIAL RESPONSE
•
STYLE DESIGNATOR: SEAL
TECHNICAL CHARACTERISTICS (FLIS)
BODY LENGTH0.090 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.750 INCHES NOMINAL IN
SEAT ANGLE IN DEG37.0
OUTSIDE DIAMETER0.958 INCHES MINIMUM AND 0.963 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONAIRCRAFT, STRATOLIFTER C-135, MISSILE, MX PEACEKEEPER
MATERIALALUMINUM ALLOY 1100
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/1,O FED SPEC 1ST MATERIAL RESPONSE OR AMS 4001 ASSN STD 2ND MATERIAL RESPONSE
STYLE DESIGNATORSEAL
WALL THICKNESS0.010 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
7A12Interchangeable
interchangeable cross-reference
interchangeable
426-6359Interchangeable
interchangeable cross-reference
interchangeable
11318197Interchangeable
interchangeable cross-reference
interchangeable
VSF1015A32Interchangeable
interchangeable cross-reference
interchangeable
10630103-31Interchangeable
interchangeable cross-reference
interchangeable
55E211-D8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 261-0320-005?
261-0320-005 is a SEAL,CONICAL,FLARED TUBE FITTING.
What parts can replace 261-0320-005?
There are 23 known substitutes for 261-0320-005: 7A12, 426-6359, 11318197 and 20 more. Substitute compatibility should be verified for your specific system.
Is 261-0320-005 still available?
261-0320-005 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026